The ornamental design for a litterreceptacle, as shown and described.
FIG. 1 is a perspective view of a first embodiment of the litter receptacle of the current design;
FIG. 2 is a left side elevation view thereof, the right side elevation view being a mirror image thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a perspective view of a second embodiment of the litter receptacle of the current design;
FIG. 7 is a front elevation view thereof; and,
FIG. 8 is a left side elevation view thereof, the right side elevation view being a mirror image thereof; and the rear elevation and top plan views being identical to the first embodiment.